Prevalence and antimicrobial susceptibility of Streptococcus species isolated from bovine mastitis
Streptococcus is one of the major pathogen groups inducing bovine mastitis. The aim of this study was to investigate the antimicrobial resistance patterns of Streptococcus species isolated from bovine mastitis milk samples in Korea from 2016 to 2021. In total, 181 (10.3%) Streptococcal isolates were collected from 1,761 quarter milk samples at 122 farms; S. uberis 39.2% (n=71), S. dysgalactiae 29.3% (n=53), S. equinus 9.9% (n=18), S. suis 6.1% (n=11), S. parauberis 4.4% (n=8), S. lutetiensis 3.9% (n=7), others 7.2% (n=13). However, S. agalactiae was not isolated. The isolates showed the highes...
Korean J. Vet. Serv. 2022; 45(3): 181-189
Prevalence and characterization of pathogenic Escherichia coli from carcasses and environmental samples of cattle and pig slaughterhouses
We investigated the virulence genes, O-serotypes, antimicrobial resistance of pathogenic E. coli isolated from carcasses (n=455) and environmental (n=372) samples of 11 cattle and 12 pig slaughterhouses from December 2020 to December 2021. E. coli were isolated from nine carcasses (2.0%), three slaughter facilities (1.4%), two utensils (2.7%) and three abattoir workers (3.5%) from four cattle and four pig slaughterhouses. Among all isolates, 13 STEC (76.5%) were identified, followed by four EPEC (23.5%). As a result of the antibiotic susceptibility test, all isolates were resistant to at least...
Korean J. Vet. Serv. 2022; 45(3): 191-199
Diarrheagenic pathogens in calves with diarrhea in Chungcheongbuk-do, Korea, from 2018 to 2021
An epidemiological study was conducted to investigate five diarrhea-causing pathogens (coronavirus, rotavirus, E. coli, Cryptosporidium, Giardia) using a rapid diagnostic kit in Hanwoo calves with diarrhea in Chungcheongbuk-do, Korea, from 2018 to 2021. A total of 22,417 fecal samples were collected from calves under 1 year of age; of those, 13,518 (60.3%) were positive for five bovine diarrhea antigens. The antigen positivity rates for rotavirus, coronavirus, E. coli, Giardia, and Cryptosporidium were 34.5%, 11.0%, 8.2%, 4.7%, and 2.0%, respectively. The prevalence of the five pathogens in ca...
Korean J. Vet. Serv. 2022; 45(3): 201-209
Prevalence study of bovine viral diarrhea virus (BVDV) from cattle farms in Gyeongsangnam-do, South Korea in 2021
Bovine viral diarrhea (BVD) is one of the problematic wasting diseases in cattle leading to huge economic losses. This study was conducted to investigate the prevalence of BVD including transient and persistent infection from cattle farms in Gyeongsangnam-do. A total of 2,667 blood samples from 24 farms were collected and the sera were subjected to ELISA to detect BVD virus (BVDV) antigen, Erns. 5’ untranslated region (5’-UTR) of BVDV-positive samples was sequenced to identify the genotype, and compared with isolates previously reported elsewhere. There were fourteen BVDV-positive ...
Korean J. Vet. Serv. 2022; 45(3): 211-219
A case of cataract surgery using phacoemulsification in a 12-year-old poodle
Cataracts occur commonly in older dogs, which can lead to partial or complete vision loss. In the present study, a 12-year-old male poodle presented for evaluation of ocular sinister (OS) cataract. This study was a clinical case report on the process of performing surgery using phacoemulsification (PHACO) and the problems that arise in patient diagnosed with OS cataract. In the oculus dexter (OD), the artificial eye was inserted because there was no electroretinography (ERG) response. In the OS, the ERG was 51.6 μV, so operation was performed because the visual pathway function remained. Sl...
Korean J. Vet. Serv. 2022; 45(3): 221-228
Monitoring for fluoroquinolones residues in raw meat in Sejong
This study describes an analytical method based on LC-MS/MS for the quantitation of 5 fluoroquinolones (Enrofloxacin, Ciprofloxacin, Marbofloxacin, Norfloxacin and Danofloxacin) in meat, and was applied to 230 meat samples for validation. Quantitation was performed based on a matrix-matched calibration to compensate for the matrix effect on the electrospray ionization. Good linear calibrations (R2≥0.998) were obtained for all fluoroquinolones at 6 concentrations of 1∼50 μg/kg. Satisfied recoveries of all fluoroquinolones were demonstrated in spiked meat at three levels from 10 to 50 ...
Korean J. Vet. Serv. 2022; 45(3): 229-236
Validation of simultaneous mycotoxin analysis method in pet food using LC-MS/MS
The simultaneous analysis of mycotoxins using LC-MS/MS, a food official analysis method, was applied with compound feed for pets with high consumer preferences. In this study, the linearity of all calibration curves showed good linearity of 0.99 or more. and both the accuracy (recovery rate) and precision (repeatability) criteria of the concentration range for each mycotoxin in the National Agricultural Products Quality Management Service’s Validation and Verification Guidelines were met. And as a result of analyzing FAPAS QCM in the same way, it was assesed that the z-scores of Aflatoxi...
Korean J. Vet. Serv. 2022; 45(3): 237-242
A HPLC-UV method for quantification of ivermectin in solution from veterinary drug products
The HPLC conditions for analysis of ivermectin in solutions dosage forms of commercial anthelmintics are different for each product. The purpose of this study was to establish a standardized chromatographic method for the quantification of ivermectin in solution. The separation was achieved on Waters Xbridge C18 column (4.6×150 nm, 5 μm) using different kinds of mobile phase composed of water/methanol/acetonitrile (15/34/51, v/v and 19.5/27.5/53, v/v), with UV detection at wavelengths 245 nm and 254 nm. A total of five commercial ivermectin in solution samples were analyzed. In this s...
Korean J. Vet. Serv. 2022; 45(3): 243-248

Current Issue Volume 45, Number 3, September 2022


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About This Journal

The Korean Journal of Veterinary Service (Korean J. Vet. Serv.) is devoted to the advancement and dissemination of scientific knowledge concerning veterinary sciences and related academic disciplines. It is published quarterly and is the official publication of the Korean J. Vet. Serv.. This journal is published in English or Korean by the KOSVES. It covers all the scientific and technological aspects of veterinary sciences in general, anatomy, physiology, biochemistry, pharmacology, microbiology, pathology, public health, parasitology, infectious diseases, clinical sciences, alternative veterinary medicine, animal welfare, food science of animal resources and other biomedical fields.

Korean Journal of
Veterinary Service

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